<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Shrew Heart Rates at Stages of Sleep</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="R.css" />
</head><body>

<table width="100%" summary="page for SleepingShrews"><tr><td>SleepingShrews</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Shrew Heart Rates at Stages of Sleep</h2>

<h3>Description</h3>

<p>Heart rates for a sample of six tree shrews at each of three stages of sleep.
</p>


<h3>Format</h3>

<p>A data frame with 18 observations on the following 4 variables.
</p>

<dl>
<dt><code>ID</code></dt><dd><p>Row ID</p>
</dd>
<dt><code>Shrew</code></dt><dd><p>Shrew ID (<code>A</code> through <code>F</code>)</p>
</dd>
<dt><code>Phase</code></dt><dd><p>Phase of sleep  (<code>DSW</code>=deep wave, <code>LSW</code>=light wave, or <code>REM</code>=dreaming)</p>
</dd>
<dt><code>Rate</code></dt><dd><p>Heart rate (beats per minute)</p>
</dd>
</dl>



<h3>Details</h3>

<p>Heart rates were recorded for a sample of six tree shrews at each of three stages of sleep.
</p>


<h3>Source</h3>

<p>Berger, R. J. and Walker, J. M. (1972) &quot;The Polygraphic Study of Sleep in the Tree Shrew,&quot; Brain, Behavior, and Evolution, v. 5, pp. 62
</p>


</body></html>
